Answer:
Actually it's not polygon. it's a nonagon. With r=8.65mm″, the law of cosines gives us side a:
a=√{b²+c²−2bc×cos40°}
a=√{149.645−149.645cos40°}
Area Nonagon = (9/4)a²cos40°
=9/4[149.645−149.645cos40°]cot20°
=336.70125[1−cos(40°)]cot(20°)
Applying an identity for the cos(40°) does not get us very far…
= 336.70125[1−(cos2(20°)−1)]cot(20°)
= 336.70125[2−cos2(20°)]cot(20°)
= 336.70125[2−(1−sin2(20°))]cot(20°)
= 336.70125[1+sin2(20°)]cos(20°)sin(20°)
= 336.70125[cot(20°)+sin(20°)cos(20°)]mm²
Answer:
5 x 2 x 3.14 = 31.4
Formula of circumference:
radius(half of your diameter or given radius) x pi(3.14 or 22/7 depending on what they tell you to use for pi) x 2(just always there when finding circumference)
I would if i had paper:( its hard to explain
Answer:
The mean is the average of all numbers. To find the mean you add all numbers and divide by how many numbers you have (i.e. 1+2+3 =6. 6/3 =2. Mean is 2.) Median is the middle of the numbers. To find the median arrange the numbers from least to greatest, and the number in the middle is the median. For example, 1, 2, 3, 4, 5. In this 3 is the median because it is in the middle. The outlier is the number that is different from others. For example, 1, 2, 3, 4, 17. In this case 17 is the outlier because it is different and farther than the other numbers.
Step-by-step explanation:
When you increase something by 40%, multiply the something by 1.4
210*1.4=294
The answer is $294
Hope this helps!
